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README.md
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particle-basic-motion.ipynb
README.md

Test-particle code ISSS-14

File description

  • This README.md file
  • particle-basic-motion.ipynb : main code for particle basic motion (this file should be modified)
  • magnetic-reconnection.ipynb : main code for studying particle acceleration in magnetic reconnection (this file should be modified)
  • fields_mhd.h5: Input datafile from a MHD simulation
  • environment.yml: Downloads and loads the required python packages for the code when Binder stars

How to open Jupyter Hub

How to run the code

  • In the left panel, click "particle-basic-motion.ipynb" or "magnetic-reconnection.ipynb"
  • Click Menu "Run", then "Run All Cells" (or click the "fast forward" symbol under the notebook tab)
  • After modifying any cell, you can re-run it by clicking the "play" symbol under the notebook tab (or Shift+Enter)
  • When you are done, please shutdown the notebook (Click Menu "File" and then "Shut Down")

What to modify

Basic particle motion

  • Observe particle trajectories and visualization of their motion
  • Investigate how various pushers impact the precision of the Larmor motion in the magnetic field
  • Investigate various particle drifts
  • How the size of time step dt influences the precision of particle position?
  • Which of the particle pushers is the most precise?

Magnetic-reconnection

  • Observe particle trajectories and, to better visualize them, change initial and final time.
  • Identify where the particles are accelerated, and correlate with electromagnetic field values.
  • Which drift motions can be identified?
  • Initial conditions:
    • Put all particles at the same initial position, varying only the velocities
    • Put particles distributed along the current sheet, with exactly the same velocity
    • Use protons instead of electrons

Notes

  • Plots can be zoomed in (using the square symbol on the left of each plot), if you use '%matplotlib widget' in the header of the notebook
  • Please avoid to use more than 4 GB of memory
  • If the memory consumption is too high, you can restart everything by clicking the menu "Kernel", then "Restart Kernel and Run All Cells..."